LCL, grids, do not trigger CellButton click if MouseDown is OutBounds, mdified patch from malcome, issue 25127

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43051 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL, grids, reformat some code that SHIT+CTRL+C keeps reminding is different

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43052 4005530d-fff6-0310-9dd1-cebe43e6787f